# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

from collections import namedtuple


class TestPath(namedtuple('TestPath', 'root relfile func sub')):
    """Where to find a single test."""

    def __new__(cls, root, relfile, func, sub=None):
        self = super(TestPath, cls).__new__(
                cls,
                str(root) if root else None,
                str(relfile) if relfile else None,
                str(func) if func else None,
                [str(s) for s in sub] if sub else None,
                )
        return self

    def __init__(self, *args, **kwargs):
        if self.root is None:
            raise TypeError('missing id')
        if self.relfile is None:
            raise TypeError('missing kind')
        # self.func may be None (e.g. for doctests).
        # self.sub may be None.


class ParentInfo(namedtuple('ParentInfo', 'id kind name root relpath parentid')):

    KINDS = ('folder', 'file', 'suite', 'function', 'subtest')

    def __new__(cls, id, kind, name, root=None, relpath=None, parentid=None):
        self = super(ParentInfo, cls).__new__(
                cls,
                id=str(id) if id else None,
                kind=str(kind) if kind else None,
                name=str(name) if name else None,
                root=str(root) if root else None,
                relpath=str(relpath) if relpath else None,
                parentid=str(parentid) if parentid else None,
                )
        return self

    def __init__(self, *args, **kwargs):
        if self.id is None:
            raise TypeError('missing id')
        if self.kind is None:
            raise TypeError('missing kind')
        if self.kind not in self.KINDS:
            raise ValueError('unsupported kind {!r}'.format(self.kind))
        if self.name is None:
            raise TypeError('missing name')
        if self.root is None:
            if self.parentid is not None or self.kind != 'folder':
                raise TypeError('missing root')
            if self.relpath is not None:
                raise TypeError('unexpected relpath {}'.format(self.relpath))
        elif self.parentid is None:
            raise TypeError('missing parentid')
        elif self.relpath is None and self.kind in ('folder', 'file'):
            raise TypeError('missing relpath')


class TestInfo(namedtuple('TestInfo', 'id name path source markers parentid kind')):
    """Info for a single test."""

    MARKERS = ('skip', 'skip-if', 'expected-failure')
    KINDS = ('function', 'doctest')

    def __new__(cls, id, name, path, source, markers, parentid, kind='function'):
        self = super(TestInfo, cls).__new__(
                cls,
                str(id) if id else None,
                str(name) if name else None,
                path or None,
                str(source) if source else None,
                [str(marker) for marker in markers or ()],
                str(parentid) if parentid else None,
                str(kind) if kind else None,
                )
        return self

    def __init__(self, *args, **kwargs):
        if self.id is None:
            raise TypeError('missing id')
        if self.name is None:
            raise TypeError('missing name')
        if self.path is None:
            raise TypeError('missing path')
        if self.source is None:
            raise TypeError('missing source')
        else:
            srcfile, _, lineno = self.source.rpartition(':')
            if not srcfile or not lineno or int(lineno) < 0:
                raise ValueError('bad source {!r}'.format(self.source))
        if self.markers:
            badmarkers = [m for m in self.markers if m not in self.MARKERS]
            if badmarkers:
                raise ValueError('unsupported markers {!r}'.format(badmarkers))
        if self.parentid is None:
            raise TypeError('missing parentid')
        if self.kind is None:
            raise TypeError('missing kind')
        elif self.kind not in self.KINDS:
            raise ValueError('unsupported kind {!r}'.format(self.kind))


    @property
    def root(self):
        return self.path.root

    @property
    def srcfile(self):
        return self.source.rpartition(':')[0]

    @property
    def lineno(self):
        return int(self.source.rpartition(':')[-1])
